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United States Patent | 5,791,103 |
Coolman ,   et al. | August 11, 1998 |
The window buck is made of extruded irregular shapes consisting of a combination of cellulose and polymer compounded specifically to be used in connection with building walls of poured concrete. The combination desirably is a mixture of approximately 70% cellulose and approximately 30% polymer. The cellulose is preferably sawdust, and the polymer preferably is polyethylene.
Inventors: | Coolman; David W. (Plymouth, WI); Sawyer; Eugene (Shawano, WI) |
Assignee: | PLYCO Corp. (Elkhart Lake, WI) |
Appl. No.: | 785751 |
Filed: | January 18, 1997 |
Current U.S. Class: | 52/215; 52/576; 249/39; 249/134; 249/142 |
Intern'l Class: | E06B 001/04 |
Field of Search: | 52/215,366,367,375,656.9,656.4,656.5,576 249/134,142,150,39 |
2787820 | Apr., 1957 | Shields et al. | 249/39. |
3380218 | Apr., 1968 | Fabich | 52/656. |
3426482 | Feb., 1969 | Mock | 52/656. |
3737266 | Jun., 1973 | Yamamoto | 249/134. |
3782054 | Jan., 1974 | Goss, Jr. | 52/656. |
3995843 | Dec., 1976 | Kasteler | 249/30. |
4430831 | Feb., 1984 | Kemp | 249/39. |
4589624 | May., 1986 | Jones | 52/215. |
4665676 | May., 1987 | Drzemala, deceased | 52/656. |